Flat primer question...
Posted: Wed Apr 13, 2022 6:44 pm
I just started loading for a new cartridge. This one is starting out with a bit of a problem.
I ordered new nosler brass for it. They are blems, but supposedly cosmetic.
I ran them through a full length sizer die, and started loading my ladder.
When I started shooting them, I was immediately getting "somewhat flattened" primers...even from the starting load. I fired two more rounds with same results....no better, no worse.
I stopped my ladder to investigate. I was nowhere near max. Had only gone up one grain in three round. Upon investigation, I found that all my brass was .010" under what my 3 fired rounds were. Headspace...base to shoulder. I used a comparitor for this. I re-prepped those three pieces with only neck sizing. Loaded to where I had gotten in the ladder. All three the same...and fired them. The primers now look normal.
Do I go ahead and load the brass thats "to short", and just go on with life excepting the flat primers, or what? Im sure the next loading will be fine, but what do I do now? Mup has been helping me with this, but I dont want to put it all on him. Is it safe to use these, even though the headspace is off and is flattening the primers....until fire formed?
Pics are the same 3 pieces of brass. One pic is what its doing with the short brass. The other is how they do after fire forming.
And this is a brand new rifle...its the brass thats off.
I ordered new nosler brass for it. They are blems, but supposedly cosmetic.
I ran them through a full length sizer die, and started loading my ladder.
When I started shooting them, I was immediately getting "somewhat flattened" primers...even from the starting load. I fired two more rounds with same results....no better, no worse.
I stopped my ladder to investigate. I was nowhere near max. Had only gone up one grain in three round. Upon investigation, I found that all my brass was .010" under what my 3 fired rounds were. Headspace...base to shoulder. I used a comparitor for this. I re-prepped those three pieces with only neck sizing. Loaded to where I had gotten in the ladder. All three the same...and fired them. The primers now look normal.
Do I go ahead and load the brass thats "to short", and just go on with life excepting the flat primers, or what? Im sure the next loading will be fine, but what do I do now? Mup has been helping me with this, but I dont want to put it all on him. Is it safe to use these, even though the headspace is off and is flattening the primers....until fire formed?
Pics are the same 3 pieces of brass. One pic is what its doing with the short brass. The other is how they do after fire forming.
And this is a brand new rifle...its the brass thats off.